Dream of Loulan Kingdom

In the Han Dynasty of Ancient China, there was a little county beside Han called Lou Lan. Lou Lan gave Han their prince and princess as a sign of friendship. But years later, they killed one of Han's peacemaker. The emporer of Han was very mad and wanted to kill the prince and the princess. But their childhood friend, also the royal protector of the empire gave them his gate pass and let them go. With that, the prince and the princess started their long journey back to Lou Lan...